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ホーム アーカイブ 役員 今後の会合 American Society of Thermal and Fluids Engineering

DEVELOPING HIGH-TEMPERATURE WATER-REPELLENT GLASS FIBER CLOTHS THROUGH ATOMIC LAYER DEPOSITION

Mohammad Reza Shaeri
Advanced Cooling Technologies, Inc., 1046 New Holland Avenue, Lancaster, PA 17601, USA

Dongsheng Guan
University of Wisconsin-Milwaukee, 3200 N Cramer Street, Milwaukee, WI 53211, USA

Fangyu Cao
George Mason University; Advanced Cooling Technologies, Inc., Lancaster, PA 17601, USA

Chris Yingchun Yuan
Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA

DOI: 10.1615/TFEC2018.flp.021804
pages 849-852


キーワード: Atomic layer deposition, Glass fiber cloth, Hydrophobic, Water-repellent, Thermal cycling.

要約

Atomic layer deposition (ALD) was used to develop hydrophobic and water-repellent glass fiber cloths for operation in high temperatures up to 200°C. The cloths were deposited with highly conformal, pinhole-free, and uniform Al2O3 films with a thickness at 200 nm. The characteristics of the deposited films were studied using a scanning electron microscope. While the uncoated cloth was hydrophilic with an equilibrium contact angle around 40°, the ALD-coated cloth became hydrophobic with an equilibrium contact angle around 125°. Such a hydrophobicity resulted in an excellent water repellant characteristic, as such, while non-coated cloth absorbed the water immediately, the ALD-coated cloth showed a resistance against water transport into the nanoscale-coated fiber cloth for over 10 hours. This characteristic was maintained in the ALD-coated cloth after thermal cycling processes by heating the coated cloth up to 200°C for one hour. The present study would open a new research direction to leverage ALD for developing water-repellent glass fiber cloths in high-temperature applications, such as those for developing high-temperature wire insulations.

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